Touch Display Panel Including Touch Unit Disposed Between Pixel Defining Layers And/Or Between Pixel Defining Layer and Encapsulation Layer

1. A touch display panel, comprising: a substrate comprising at least one light emitting region and a non-light emitting region located outside the light emitting region; an anode disposed upon the substrate and located in the light emitting region; a first pixel defining layer and a second pixel defining layer, wherein the first pixel defining layer and the second pixel defining layer are sequentially disposed upon the substrate, and at least one hole is disposed on the anode along a thickness direction of the first pixel defining layer and the second pixel defining layer and penetrates the first pixel defining layer and the second pixel defining layer to define the light emitting region of the substrate; an organic functional layer disposed on the anode and disposed in the hole; an encapsulation layer disposed on one side of the second pixel defining layer away from the substrate; and a plurality of touch units disposed between the first pixel defining layer and the second pixel defining layer, and/or the plurality of the touch units disposed between the second pixel defining layer and the encapsulation layer, wherein both the first pixel defining layer and the second pixel defining layer are organic insulating layers; and wherein the plurality of the touch units are disposed between the second pixel defining layer and the encapsulation layer, the touch display panel further comprises a first cathode and a second cathode, the first cathode is disposed between the first pixel defining layer and the second pixel defining layer and located in the non-light emitting region, the second cathode is disposed between the organic functional layer and the encapsulation layer and located in the light emitting region, and the first cathode and the second cathode are electrically connected to each other by a through hole penetrating in the second pixel defining layer.

2. The touch display panel of claim 1 , wherein a sum of thicknesses of the first pixel defining layer and the second pixel defining layer ranges from 1.0 micrometer to 2.0 micrometers.

3. The touch display panel of claim 2 , wherein the thickness of the first pixel defining layer is less than the thickness of the second pixel defining layer.

4. The touch display panel of claim 1 , wherein a thickness of the first cathode is greater than a thickness of the second cathode.

5. The touch display panel of claim 4 further comprising an antireflection protective layer disposed between the second cathode and the encapsulation layer.

6. The touch display panel of claim 5 , wherein the second cathode is made of silver, and the antireflection protective layer is made of lithium fluoride.

7. The touch display panel of claim 1 , wherein each of the touch units comprises a first electrode and a second electrode, the first electrode and the second electrode constitute a mutual-capacitive touch electrode, the second pixel defining layer comprises a first pixel defining sub layer and a second pixel defining sub layer, the first pixel defining sub layer is disposed between the second pixel defining sub layer and the first pixel defining layer, the first electrode is disposed between the first pixel defining sub layer and the second pixel defining sub layer, and the second electrode is disposed between the second pixel defining sub layer and the encapsulation layer.

8. The touch display panel of claim 7 , wherein a thickness of the first pixel defining sub layer is greater than a thickness of the second pixel defining sub layer.

9. A touch display panel comprising: a substrate comprising at least one light emitting region and a non-light emitting region located outside the light emitting region; an anode disposed upon the substrate and located in the light emitting region; a first pixel defining layer and a second pixel defining layer, wherein the first pixel defining layer and the second pixel defining layer are sequentially disposed upon the substrate, and at least one hole is disposed on the anode along a thickness direction of the first pixel defining layer and the second pixel defining layer and penetrates the first pixel defining layer and the second pixel defining layer to define the light emitting region of the substrate; an organic functional layer disposed on the anode and disposed in the hole; an encapsulation layer disposed on one side of the second pixel defining layer away from the substrate; and a plurality of touch units disposed between the first pixel defining layer and the second pixel defining layer, and/or the plurality of the touch units disposed between the second pixel defining layer and the encapsulation layer, wherein the plurality of the touch units are disposed between the second pixel defining layer and the encapsulation layer, the touch display panel further comprises a first cathode and a second cathode, the first cathode is disposed between the first pixel defining layer and the second pixel defining layer and located in the non-light emitting region, the second cathode is disposed between the organic functional layer and the encapsulation layer and located in the light emitting region, and the first cathode and the second cathode are electrically connected to each other by a through hole penetrating in the second pixel defining layer.

10. The touch display panel of claim 9 , wherein a sum of thicknesses of the first pixel defining layer and the second pixel defining layer ranges from 1.0 micrometer to 2.0 micrometers.

11. The touch display panel of claim 10 , wherein the thickness of the first pixel defining layer is less than the thickness of the second pixel defining layer.

12. The touch display panel of claim 9 , wherein a thickness of the first cathode is greater than a thickness of the second cathode.

13. The touch display panel of claim 12 further comprising an antireflection protective layer, wherein the antireflection protective layer is disposed between the second cathode and the encapsulation layer.

14. The touch display panel of claim 13 , wherein the second cathode is made of silver, and the antireflection protective layer is made of lithium fluoride.

15. The touch display panel of claim 9 , wherein each of the touch units comprises a first electrode and a second electrode, the first electrode and the second electrode constitute a mutual-capacitive touch electrode, the second pixel defining layer comprises a first pixel defining sub layer and a second pixel defining sub layer, the first pixel defining sub layer is disposed between the second pixel defining sub layer and the first pixel defining layer, the first electrode is disposed between the first pixel defining sub layer and the second pixel defining sub layer, and the second electrode is disposed between the second pixel defining sub layer and the encapsulation layer.

16. The touch display panel of claim 15 , wherein a thickness of the first pixel defining sub layer is greater than a thickness of the second pixel defining sub layer.